Linkage device for an umbrella

Abstract

A linkage device for an umbrella includes a pivot and a joint. A frame having an opening defined therein is integrally formed on a periphery of the pivot. A deformable leaf is provided to the joint and has a configuration to mate with a recess defined in the joint. Furthermore, a pivot rod is provided to the joint and functions as a pivot when the stretchers and the ribs are expand or folded. Therefore, when a portion of the frame is received within the joint, the deformable leaf is able to securely enclose the portion of the frame within the joint.

What is claimed is: 
     
       1. A linkage member for an umbrella comprising: a pivot having a tube for receiving a rib of said umbrella therethrough and a frame integrally formed on a periphery of said tube and defining therein an opening;   a joint having a receiving seat for receiving a stretcher of said umbrella therein, a body integrally formed with said receiving seat and defining in a face thereof a recess in which a positioning rod is provided, an extension integrally extending out from a bottom of said body, a pivot rod extending upward from said extension and a deformable leaf securely connected with a distal end of said pivot rod and defining therein a through hole aligned with said positioning rod, and a crease;   said deformable leaf being able to extend through said opening of said frame and having a portion of said frame received within said joint;   said deformable leaf being able to be folded and having said positioning rod extend into said through hole and thus securely maintaining said portion of said frame within said joint.   
     
     
       2. The linkage device as claimed in claim 1, wherein a portion of said deformable leaf is configured to mate with said recess of said body. 
     
     
       3. A linkage member for an umbrella comprising: a pivot having a tube for receiving a rib of said umbrella therethrough and a frame integrally formed on a periphery of said tube and defining therein an opening;   a joint having a receiving seat for receiving a stretcher of said umbrella therein, a body integrally formed with said receiving seat and defining in a face thereof a recess in which a through hole is defined, an extension integrally extending out from a bottom of said body, a pivot rod extending upward from said extension and a deformable leaf securely connected with a distal end of said pivot rod and formed thereon a positioning rod aligned with said through hole and a crease;   said deformable leaf being able to extend through said opening of said frame and having a portion of said frame received within said joint;   said deformable leaf being able to be folded and having said positioning rod extend into said through hole and thus securely maintaining said portion of said frame within said joint.   
     
     
       4. The linkage device as claimed in claim 3, wherein a portion of said deformable leaf is configured to mate with said recess of said body.